<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>04_渐变小案例</title>
  <style>
    .box1{
      width: 600px;
      height: 800px;
      padding: 20px;
      border: 1px solid black;
      margin: 0 auto;
      background-image: repeating-linear-gradient(transparent 0px,transparent 29px,gray 30px);
      background-clip: content-box;
    }
    .box2{
      width: 200px;
      height: 200px;
      border-radius: 50%;
      background-image: radial-gradient(at 80px 80px,white, #333);
    }
  </style>
</head>
<body>
  <div class="box1"></div>
  <div class="box2"></div>

  
</body>
</html>